Malicious PDF — malware analysis report

Static analysis result for SHA-256 a66b4e0eaed24022…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 07:05:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7deeb1cf9a261f19e35a1476db6a5b3b SHA-1: 85a6f95c4d384e2d1efae6d492acd132639cf937 SHA-256: a66b4e0eaed240225d2a0ee43e557d70173af3e2e2c7b003f0e2894e7f20dc05
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game cheats and generators, directing users to the URL http://netcdn.tw/app/431946152/roblox-prison-lifev20-cheats-game-hack. This URL is associated with malicious activity, and the ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to redirect users to a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/roblox-prison-lifev20-cheats-game-hack PDF link annotation
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-openrewards_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-how-to-get-gamepasses-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-games-similar-to-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-is-being-hacked-9-21-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-skins-free-download-girl_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hacks-for-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-free-items-glitch-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/adf-ly-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/gta-5-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-warning-message-cheating_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-sharkbite-sharkteeth-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303B 21904 bytes
SHA-256: 20919e1928f34f19e3dfd036bb276501ca6816977d1f4d04345e3998dd2f3e99
font_01_sfnt_off00006095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6095 19252 bytes
SHA-256: 012756ac6d077bd77a1f78338ddd9715fa3247f0ad9aa6f991bb9e073ac34abd

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